Connecting means



21, 1946- G. .J. SODERBERG ,84/

1; commcrme uslms Filed 001:. 19, 1945 4 r ve/vs rs Patented May 21,1946 CKHHHHI UNITED STATES PATENT OFFICE Claims.

This invention relates to separable connecting means between a drivenshaft and objects secured' thereto in such a manner that they be readilyassembled and disassembled therefrom.

One object of the invention is the provision of such a connecting meansespecially adapted for use in connection with a buffing or polishingmachine.

Another object of the invention is the provision of such a connectionwhich will permit the use of polishing Or bufilng disks of variousthicknesses.

A further object of the invention is the provision of means forpreventing relative rotary movement between the shaft and polishing diskcarried thereby.

Another object of the invention is the provision of a device of thisnature, wherein the maximum simplicity of construction and operation issecured.

Other objects and advantages will become more apparent as the nature ofthe improvements is better understood, the invention consisting in thenovel arrangement and co-relation of parts, herein described, andillustrated in the accompanying drawing wherein similar referencecharacters are used to denote corresponding parts in the several views.

In carrying out a preferred embodiment of the invention, it was foundadvantageous to provide the polishing disk holding shaft with a chamberor recess for the reception of a removable plug, and to further providethe shaft with a spring member for releasably engaging the said plug,the polishing disk being held on the plug between a flange thereon and asimilar flange on the shaft.

In the drawing:

Figure 1 is a fragmental view in perspective of a shaft provided withpolishing disk connecting means in accordance with one embodiment of thepresent invention;

Figure 2 is a perspective view of the adjustable end plug;

Figure 3 is an end view in elevation of the shaft looking from thebottom of Fig. 1;

Figure 4 is a detail view in perspective of the plug retaining spring;

Figure 5 is a perspective view of the shaft with the adjustable plugmounted thereon.

Referring now to the drawing in detail, the numeral l0 indicates a shaftwhich may be supported horizontally or vertically as shown in a. latheor any other machine A. The said shaft The flange ll may be square inform and may be provided with teeth or projections 13.

A counterbore of considerable length forms a chamber I4 in the free endof said shaft for the reception of the shank l6 of a plug IS. The plugI5 has a flange I! at one end thereof provided with teeth 18.

One side of the counterbored end of the shaft is slotted or cut away asat IS, the said cut away portion however extending beyond the bottom 20of the counterbore, to a point 2|, the area 22 be tween the points 20and 2| forming a seat for a plate spring 23.

The said spring 23 is secured at one end thereof to the seat 22 by meansof a rivet 24 and is provided at its opposite end with a loop 25 andwith a plurality of holes 26 intermediate the said loop 25 and a bowedportion 21 directly below the hole 28, said hole 28 accommodating therivet 24.

In practice when it is desired to secure a polishing disk 29 to theshaft II) the said disk which has a central square hole is placed overthe shank l6 of the plug, then the said shank is inserted into thecounterbore or chamber I 4, the spring 23 being raised by pullingupwardly or outwardly on the loop 25. When in position, the spring ispermitted to snap back into position where one of the holes 26 engages apin or projection 30 on the plug shank. The hole 26 engaged by the pin30 depends upon the thickness of the disk 29. It is to be understoodthat the said disk is provided with suitable square recesses ordepressions to accommodate the flanges II and H. The holes 26 are soarranged as to permit the use of disks of pre-determined thicknesses.The disc may be also held by teeth l3 and I7.

It will readily be seen that in view of the fact that the spring extendsinto the shaft slot l9 relative rotation between the plug and shaft isprevented. The teeth l3 and I8 likewise prevent such rotation as well asrelative roation between the polishing disk 29 and shaft I 0. A slot Orkeyway 3| in the shaft flange I l allows the pin 30 on the plug II topass into the counterbore H.

To replace the polishing disk 29, the spring loop 25 is lifted up, theplug and disk withdrawn, and a different disk inserted in place as aboveoutlined.

From the foregoing it will be seen that with the improved connections ofthe present invention, buffs, polishing disks and other similar deisprovided at its extreme end with a flange ll. vices may be readilyremovably assembled on the end of a shaft and maintained thereon againstrelative rotation with said shaft.

It will, further be seen that due to spaced apart holeslfi the springdisks of various pre-determined thicknesses may be used.

What is claimed is:

1. In a machine of the nature referred to, a rotatable shaft, said shafthaving at one end thereof, a longitudinal chamber and a slot mergingwith said chamber, a disk carrying plug adapted to be inserted endwiseinto the said chamber, resilient means secured to the shaft andextending lengthwise of said slot, and means on said plug for engagementwith the resilient means for maintaining the said plug in said chamber.

2. In a machine of the nature referred to, a rotatable shaft, said shafthaving at one end thereof, a longitudinal chamber and a slot mergingwith said chamber, a disk carrying plug adapted to be inserted endwiseinto the said chamber. a plate spring secured at one end to the shaft,said spring extending longitudinally of said slot and provided with aplurality of spaced apart holes, and a projection on said plug adaptedto engage one of the spring holes.

3. In a machine of the nature referred to, a rotatable shaft, said shafthaving at one end thereof, a longitudinal chamber open at one of itsends and a slot merging with said chamber, a flange on the shaft at theopen end of the chamber, a plug for supporting a polishing disk thereonand adapted at one end thereof to be inserted into the chamber, a flangeat the opposite end of the plug, means carried by said flanges forpreventing relative rotation between the polishing disk and shaft andplug, a plate spring secured at one end to the shaft, said springextending longitudinally of said slot and provided with a plurality ofspaced apart holes, and a projection on said plug adapted to engage oneof the spring holes.

4. In a machine of. the nature referred to, a rotatable shaft, saidshaft having at one end thereof, a longitudinal chamber open at one ofits ends and a slot merging with said chamber, a flange on the shaft atthe open end of the chamber, a plug for supporting a polishing diskthereon and adapted at one end thereof to be inserted into the chamber,a flange at the opposite end of the plug, means carried by said flangesfor preventing relative rotation between the polishing disk and shaftand plug, a depressed seat formed on the shaft at one end of the slot, aplate spring secured at one end to the said seat, said spring extendinglongitudinally of said slot and provided with a plurality of spacedapart holes, and a projection on said plug adapted to engage one of thespring holes.

5. A connection according to claim 2, wherein the spring is providedwith means by which it may be lifted out of engagement with the saidprojection.

GUSTAVE J. SODERBERG.

